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Umbilicus may refer to:

  • Umbilicus (mollusc), a feature of gastropod, Nautilus and Ammonite shell anatomy
  • Umbilicus, a synonym for the navel or belly button
  • Umbilicus (genus), a genus of over ninety species of perennial flowering plants
  • Umbilicus urbis Romae, the designated center of the city of Rome from which and to which all distances in Rome and the Roman Empire were measured
  • Umbilicus mundi, or "the world's navel", a Greek artifact